Segment reporting (Details) $ in Thousands	12 Months Ended
	Jan. 28, 2022 USD ($) segment	Jan. 29, 2021 USD ($) segment	Jan. 31, 2020 USD ($) segment
Net sales data for classes of similar products
Net sales	$ 34,220,449	$ 33,746,839	$ 27,753,973
Number of reportable segments
Number of reportable operating segments | segment	1	1	1
Consumables
Net sales data for classes of similar products
Net sales	$ 26,258,605	$ 25,906,685	$ 21,635,890
Seasonal
Net sales data for classes of similar products
Net sales	4,182,165	4,083,650	3,258,874
Home products
Net sales data for classes of similar products
Net sales	2,322,367	2,209,950	1,611,899
Apparel
Net sales data for classes of similar products
Net sales	$ 1,457,312	$ 1,546,554	$ 1,247,310